2 they are easy to compress,
2 they expand to fill their containers,
3 they occupy far more space than the liquids or solids from which they form.
hope this helped!
I’m just gonna try an wander the the best I can, sorry if this is wrong I haven’t been taught this subject yet-
I’m Guessing its sublimating
( I’m sorry if this is wrong, remember I haven’t been taught this yet I’m only in 6th-)
Work input is something done with a simple machine.
Output is the same except the use more compound machines with less force.